<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
这是登录界面

<form action="/user/selectUser" method="post">
  <input type="text" name="username"><br>
  <input type="password" name="password"><br>
  <input type="submit" value="登录">
</form>
</body>
</html>